back channel

基本解釋

How far do other, similar relationships between military establishments provide a back-channel when conventional diplomacy is not enough?
當(dāng)傳統(tǒng)外交乏力，軍方當(dāng)局之間類(lèi)似的關(guān)系在提供一個(gè)后備通道方面，能走多遠(yuǎn)？
Five other fields in the first auction may be offered again, but not until next year—and only if back-channel talks with unsuccessful bidders come to nothing.
參與第一次開(kāi)標(biāo)的其它五處油田可能再次出售，但要等到明年──而只要未投標(biāo)者經(jīng)由秘密管道談判注定失敗。
IN SEPTEMBER 1999, when East Timor was burning and Indonesia was angrily accusing Australia of supporting secession there, a diplomatic back-channel quietly opened.
1999年9月，東帝汶一片火海，印度尼西亞憤怒地指責(zé)澳大利亞在那支持它的分離，而這時(shí)，兩國(guó)之間一條秘密渠道開(kāi)通了。

He cites the early involvement of the CEOs, referencing back-channel efforts involving News Corp.
FORBES: A Hollywood Ending?
Have there been any discussions, back-channel phone conversations between the President and any of these Republican leaders?
WHITEHOUSE: Press Briefing
Back-channel sales data from web advertisers indicates pricing has begun heading higher as demand remains strong, he noted in a research note Tuesday.
FORBES: Magazine Article